Edge grinding device for doors or the like



Jan. 14, 1969 c YOUNG 3,421,264

EDGE GRINDING DEVICE FOR DOORS OR THE LIKE Filed April 25, 1966 Sheet 0f 2 I N 'ENTOR.

CLYDE D. YOUNG ATTORNEY Jan. 14, 1969 c. D. YOUNG EDGE GRINDING DEVICE FOR DOQRS OR THE LIKE Filed April 25, 1966 Sheet 2 'of2 at w I N VENTOR.

CLYDE D.YOUNG n. %4- ATTORNEY United States Patent 3 Claims ABSTRACT OF THE DISCLOSURE A device for grinding edging strips affixed to the edges of a door or other panel and initially projecting beyond the faces of the door, the device including a guide rail mounted in a groove in a table and having spaced cams extending above a working surface of the table, and a motor driven grinding mandrel having its top surface in alignment with the tops of the cams. A door with edging strips may be slid across the cams with one strip in contact with the mandrel and another strip between two cams to grind the strip flush with the door. The guide rail may be adjusted vertically by means of shims to realign the cams with the mandrel after the mandrel has been redressed.

This invention relates to an edge trimming device for doors or other panels and has for its purpose to trim the edge of Formica or similar facing to the door whereby the doors and the projecting edges of the Formica are held in a horizontal path upon a table top and to grind the Formica edges by a grinding cutter over which the door is conducted around its four sides or edges and supporting means for the door as it traverses the table, to maintain the door in a true course of travel with respect to the grinder.

Novel features of construction and operation of the device will be more clearly apparent during the course 'of the following description, reference being had to the accompanying drawings wherein has been illustrated a preferred embodiment of the device and wherein like characters of reference are employed to denote like parts throughout the several figures.

In the drawings:

FIGURE 1 is a top plan view of a supporting table, embodying the invention,

FIGURE 2 is a front elevational view thereof,

FIGURE 3 is a transverse sectional view taken substantially on line 33 of FIGURE 1,

FIGURE 4 is a longitudinal section taken substantially on line 4-4 of FIGURE 3,

FIGURE 5 is a longitudinal section taken substantially on line 5-5 of FIGURE 3,

FIGURE 6 is a longitudinal section taken substantially on line 66 of FIGURE 3,

FIGURE 7 is a fragmentary section taken substantially on line 7-7 of FIGURE 1,

FIGURE 8 is a fragmentary perspective view of a door to be ground, and

FIGURE 9 is a similar view showing the door after it has been ground.

Referring specifically to the drawings, there has been provided a table 5, having a top 6 and connected with the top 6 are angular supporting legs 7. The top 6 is connected to the legs 7, by a bar 8, held in assembled relation by an angle plate 9, that is bolted or otherwise connected thereto.

The top 6 is provided with a transverse groove 10 and seated within the groove 10 is a guide rail 11, the upper surface of which is provided with a multiplicity of spaced apart cams 12 and the rail 11 is adjustably seated upon shims 13 that are disposed within the groove 10 and conice stitutes the means for adjusting the rail 11 in an upward manner, for purposes to be presently described. Connected with the top 16, is an elevated housing 14 in which is supported an electric drive motor 15. The motor 15 is provided with a drive shaft 16, having a chuck 17 that receives the shaft of a rotary grinder device 18. The grinder device 18 is parallel with the tops of the cams 12 and the shims 13 permit the adjustment of the rail 11 at such time as the grinder 18 is redressed. The motor 15 is seated within a circumferential groove 19, see particularly FIGURE 3 and the motor is bolted into a plate 20, that is fixed within the housing 14. The rail 11 after adjustment, by the moving of one of the shims 13, is rigidly bolted into position upon the table top by bolts 21. The housing 14 is faced with Formica or the like upon its top, front and rear edges.

Extending transversely of the table, are bars 22, constituting a support for the table top 6 and with the bars 22 being bolted to the angle 9 and to a plate 23 at the rear of the device.

The table top 6 is slightly spaced from the front wall of the housing 14 and constitute an escape opening for material ground from the edges of the door. The door, indicated at 24 has its edges covered with strips of Formica 25, that normally project beyond the faces of the door. The door may be conveyed over the cams 12 by holding one edge of the door against the front wall of the housing 14 with the edges of the Formica entering any particular space between the cams 12, permitting the edges of the projecting Formica to engage the grinder 18, whereby the Formica is ground flush with the faces of the door 24. The door 24 may be a conventional wood door or a flake board. The supporting means for the motor 15 is fixedly connected to the frame member 20 by elongated screws 26.

In the use of the device, the rail 11, carrying the cams 12, are seated within the groove 10 upon a plurality of shims 13 and with the tops of the cams 12 being accurately aligned with the grinder 18. The door 24, having applied thereto the Formica trim edges 25, is then disposed upon the table, and with one Formica edge 28 forward of the earns 12. The door is then passed over the cams 12, causing the grinder 18 to grind the edges of the Formica flush flush with the face of the door 24. Continuing in this manner for each edge 25, one corner is ground at the beginning of each stroke, after the first, and the fourth corner is ground separately at the finish. This is necessary because the Formica at the leading and trailing edges of the door rides up over the cams.

It will be apparent from the foregoing that a very novel means has been provided to grind the edges of doors or other panels that have been provided with Formica or laminated plastic and bonded thereto by suitable cement. After the edges have been provided with the Formica or plastic covering, it is necessary that the door be ground upon its edges to remove the excessive plastic or Formica and to grind the edges so that they will be flush with the door. The cams 12 permit the door to be laid upon the table and conducted into engagement with the grinder and with the cams permitting the opposite edge of the door to enter between the spacing of the cams and so that the face of the door will lie flat upon the cams and in accurate alignment with the grinder and permits the door to be shoved along the table to ride upon the cams and, when one edge has been ground, the door is inverted so that the opposite edge can engage the grinder and then of course the ends of the door are ground in a similar manner, providing a very desirable finish to the marginal edge of the door. When the grinder has been worn down sufficiently, it is necessary that it be refaced and when this occurs, it is also necessary to vary the level of the cams such being essential so that the tops of the cams are in accurate alignment with the cutter. This is performed by removing the bolts 21 and the bar or rail 11 and then peel ofl? one of the shims 13, then reseating the rail 11 and bolting it down tightly by the bolts 21. The device greatly simplifies the grinding of the edges of the door and the door in the finished condition will have the appearance of a structure of FIGURE 9. Other structural features will be obvious to persons skilled in the art.

It is to be understood that the invention is not limited to the precise construction shown, but that changes are contemplated as readily fall within the spirit of the invention as shall be determined by the scope of the subjoined claims.

I claim:

1. An edge grinding device for grinding edging strips affixed to the edges of a panel which strips initially project beyond the faces of the panel, said device including in combination a Work table having a fiat horizontal working surface, said working surface having a groove extending transversely thereof, a guide rail mounted in said groove and having a plurality of transversely spaced cams extending above said working surface, a plurality of shims supporting said guide rail, means detacha-bly affixing said guide rail to said table allowing removal of one or more of said shims to adjust the vertical position of said guide rail and thereby change the height of said cams above said Working surface, a grinding mandrel supported for rotation by said table with a top surface thereof in alignment with the tops of said cams, and a motor supported by said table and coupled to said grinding mandrel for rotating said mandrel, whereby a panel having said edging strips thereon may be moved across and in contact with said cams with one strip contacting the mandrel and another strip between two of said cams to grind said one strip flush with one side of said panel, and all of said strips may be ground in the same manner, the guide rail being vertically adjustable as aforesaid to position the tops of said cams in horizontal alignment with the top of said grinding mandrel upon redressing of said mandrel.

2. The device as claimed in claim 1 including a housing extending above said working surface, the motor being located in said housing, and a shaft connecting said motor to said grinding mandrel and extending through one wall of said housing, said housing serving as a guide for guiding the movement of said panel.

3. The device as claimed in claim 2 in which said table includes two sections spaced apart sufficiently to form said groove and also spaced from said housing to provide a space under said mandrel permitting escape of material ground from said strips.

References Cited UNITED STATES PATENTS 298,176 5/1884 Claybourne 51-74 2,183,699 12/1939 Schweiker 51-92 X 2,560,843 7/1951 Brosemer 5174 X 2,939,369 6/1960 Kelso 51-240 X 2,948,085 8/ 1960 Casady 5174 3,041,788 7/1962 Carlow 51-87 3,114,223 12/1963 Hammond 51240 X ROBERT C. RIORDON, Primal Examiner.

D. G. KELLY, Assistant Examiner,

US. Cl. X.R. 5ll02, 240 

